Self-Relation in Drizzle ORM?

I'm trying to create a folder/file structure in postgresql with drizzle orm I have the following table:

export const folder = pgTable("folders", {
    id: uuid("id").primaryKey(),
    name: varchar("name", {length: 64}).notNull(),
    parent: uuid("parent").references(() => folder.id),
    owner: uuid("owner").references(() => user.id),
    color: varchar("color", {length: 7}).notNull(),
    level: integer("level").notNull(),
    createdAt: timestamp("createdAt").defaultNow().notNull(),
    updatedAt: timestamp("updatedAt").defaultNow().notNull()
})

export const folder = pgTable("folders", {
    id: uuid("id").primaryKey(),
    name: varchar("name", {length: 64}).notNull(),
    parent: uuid("parent").references(() => folder.id),
    owner: uuid("owner").references(() => user.id),
    color: varchar("color", {length: 7}).notNull(),
    level: integer("level").notNull(),
    createdAt: timestamp("createdAt").defaultNow().notNull(),
    updatedAt: timestamp("updatedAt").defaultNow().notNull()
})

but im getting this error in typescript

'folder' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer.ts(7022)

Sorry if I overlooked something, I'm new to drizzle

4 Replies

Sillvva•4mo ago

https://orm.drizzle.team/docs/indexes-constraints#foreign-key

If you want to do a self reference, due to a TypeScript limitations you will have to either explicitly set return type for reference callback or user a standalone foreignKey operator.

import { serial, text, integer, foreignKey, pgTable, AnyPgColumn } from "drizzle-orm/pg-core";
export const user = pgTable("user", {
  id: serial("id"),
  name: text("name"),
  parentId: integer("parent_id").references((): AnyPgColumn => user.id)
});
// or
export const user = pgTable("user", {
  id: serial("id"),
  name: text("name"),
  parentId: integer("parent_id"),
}, (table) => {
  return {
    parentReference: foreignKey({
      columns: [table.parentId],
      foreignColumns: [table.id],
      name: "custom_fk"
    }),
  };
});

import { serial, text, integer, foreignKey, pgTable, AnyPgColumn } from "drizzle-orm/pg-core";
export const user = pgTable("user", {
  id: serial("id"),
  name: text("name"),
  parentId: integer("parent_id").references((): AnyPgColumn => user.id)
});
// or
export const user = pgTable("user", {
  id: serial("id"),
  name: text("name"),
  parentId: integer("parent_id"),
}, (table) => {
  return {
    parentReference: foreignKey({
      columns: [table.parentId],
      foreignColumns: [table.id],
      name: "custom_fk"
    }),
  };
});

Drizzle ORM - Indexes & Constraints

Drizzle ORM is a lightweight and performant TypeScript ORM with developer experience in mind.

piton•4mo ago

thanks a lot, searched on google for self reference in drizzle orm and this page didn't show up idk why

Sillvva•4mo ago

Found it just by checking the section on foreign keys in indexes, but it's also showing up in the docs search.

piton•4mo ago

okay, thanks

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Self-Relation in Drizzle ORM?